I have never seen this before, but my Mesa 6l6's burn Bright BLUE! The filaments are orange but it looks like the gas is blue. Does this make sense? I had Svetlana's in my TSL and Groove Tubes in my Randall MTS but they never glowed Blue. I'm not sure how old the tubes are since I bought the amp used.
Excuse me if this a stupid question, or if this is normal, but any help would be appreciated.
Excuse me if this a stupid question, or if this is normal, but any help would be appreciated.